I'm a girl that is bi and has a boyfriend and I really like a girl that I live with what do I do

well I really like this one girl that I live with but I have a boyfriend and I think I love him but I actually really like this girl and she has a boyfriend to but ahhhhhh. I really want to tell her but I cant because I dont want to mess up the friendship and living with her will be weird. its weird because she is always kissing my cheek and hugging me and sitting on me and is telling me she loves me but like playing around in a way because she is straight. then one day we were talking and she was trying to see how I found out that I was bi and I dont want to tell her and then she starts to ask if it was because of one of the other girls and I told her no like 3 times and then she asked if it was because of her and I froze for like 3 second and she sat on me like if she was with her boyfriend and oh my god I so wanted to kiss her but I couldnt. well after I froze I just blurted out no and even if I did like someone here I wouldnt tell you. she just looked at me and bit my cheek also she loves to sleep in my bed with me and she likes to hold my hand every now and then. oh yeah well I live in a childrens home with 7 other girls and they are all questioning me on who I like. one of the other girls is bicurious and I think I like her a little but not as much as the other girl.
what do I do? HELP!!!!!!!

First of all, you aren't on the stand and you aren't under oath. Just because someone asks you a question doesn't mean that you have to answer.

For the rest of it, it's actually pretty simple. Do you like your boyfriend enough to treat him the way you want him to treat you (... as in not flirting with someone else)? If you don't like him enough to treat him well (... as in not flirting with someone else), then it should be clear to you what your next move is.

If you decide you don't like him enough to respect his feelings... There's no reason why you have to be the first to make a clear move on her; if she's interested, let her be the one to kiss you or ask you out. Let her be the one with the most to lose.

Well , look don't tell her first ... your bisexuel and you know .. but let her to make the first step and tell you what she's thinking about and what she want do !

Just tell her I think she'll understand!!!